Apparatus for screwing together and unscrewing pipe joints and the like



Oct.23,1923. I mm? H. C- THRIFT APPARATUS FOR SCREWING TOGETHER ANDUNSCREWING PIPE JOINTS AND THE LIKE Filed Jan. 9. 1922 ?atented Get. 23,1923.

HOMER C. THRIFT, C'F BUBKBURNETT, TEXAS.

APPARATUS roe sonnwrrro TOGETHER AND UnsoREwInG PIPE JOINTS AND THELIKE.

Application filed January 9, 1922. Serial No. 527,990.

T 0 all 10 71cm it may concern:

Be it known that I, HOMER C. THRIFT, citizen of the United States,residing at Burkburnett, in the county of Wichita and State of Texas,have invented certain new and useful Improvements in an Apparatus forScrewing Together and Unscrewing Pipe Joints and the-like, of which thefollowing is a specification.

This invention relates to new and useful improvements in an apparatusfor screwing together and unscrewing joints of pipe and the like.

One object of the invention is to provide a device of the characterdescribed formed to readily engage with a tubular 0r cylindrical bodysuch as a joint of pipe or rod, whereby the same may be turned for thepurpose of screwing said joints together or unscrewing and separatingthem.

Another object of the invention is to provide a device of the characterdescribed which may be readily released from the pipe.

A further feature of the invention resides in the provision of a deviceof the character described which will readily receive pipes or rods ofdifferent diameters.

IVith the above and other objects in view the invention has particular.relation to certain novel features of construction, operation andarrangement of parts, an example of which is given in this specificationand illustrated in the accompanying drawings, wherein:

Figure l is a plan view of the device partially broken away and,

Figure 2 is a vertical sectional view.

Referring now more particularly to the drawings, thenumeral 1 designatesa ringlike member having peripheral sprocket teeth 2 by means of whichit may be driven by a conventional sprocket chain. Detachaoly secured tothe inside of this ring, at one side there is an arcuate toothed jaw 3.Opposite this fixed jaw there is the movable jaw 4 which is swung uponthe outer end of the arm 5. This arm is formed integral with the post 6which works in a bearing 7 in the ring 1. The pipe to be turned isindicated by the numeral 8. The post 6 has a square extension 9 formedto receive a wrench 10 by means of which it may be turned. In Figure 1the movable jaw 4 is shown, in dotted lines, released from the pipe andin full lines, in engagement with the pipe. In operation the ring 1 maybe rotated in either direction, as arm 5 is of sufficient length toprevent it from passing center so that the device may be used either forscrewing or unscrewing pipe. When it IS desired t pass a collar throughthe jaws the wrench 10 is applied and the jaw 5 swung backwardly, asindicated in dotted lines in Figure 1 so as to give room for the collato pass through and said jaw may then be swung back into engagement withthe pipe.

What I claim is;

1. A device of the character described including a ring-like rotarymember having a fixed jaw within said member, a swinging jaw movabletoward and from the fixed jaw, and peripheral teeth carried by therotary member.

2. A device of the character described including a ring-like rotarymember forming a casing and having peripheral sprocket teeth adetachable jaw fixed therein, an opposing movable jaw mounted thereinand means for moving the latter jaw toward and from the former.

3. A device of the character described including a rotary ring providedto receive a pipe, an arcuate pipe engaging jaw fixed to one sidethereof, a swinging arm mounted in the other side of the ring, a pipeengaging jaw carried by said arm, and means for manually swinging saidarm.

4:. A device of the character-described in cluding an annular rotatablecasing provided to receive a pipe, a pipe engaging member fixed to oneside thereof within the casing, a swinging arm pivoted to the casingopposite said member, a pipe engaging member carried by the free end ofsaid arm and means for manipulating the arm.

In testimony whereof I have signed my name to this specification.

HOMER C. THRIFT.

